Activation of tyrosine kinases by mutation of the gatekeeper threonine.
Activation of tyrosine kinases by mutation of the gatekeeper threonine.
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DOI:
10.1038/nsmb.1486
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发表时间:
2008-10
影响因子:
16.8
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中科院分区:
文献类型:
--
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Protein kinases targeted by small-molecule inhibitors develop resistance through mutation of the ‘gatekeeper’ threonine residue of the active site. Here we show that the gatekeeper mutation in the cellular forms of c-ABL, c-SRC, platelet-derived growth factor receptor-α and -β, and epidermal growth factor receptor activates the kinase and promotes malignant transformation of BaF3 cells. Structural analysis reveals that a network of hydrophobic interactions—the hydrophobic spine—characteristic of the active kinase conformation is stabilized by the gatekeeper substitution. Substitution of glycine for the residues constituting the spine disrupts the hydrophobic connectivity and inactivates the kinase. Furthermore, a small-molecule inhibitor that maximizes complementarity with the dismantled spine (compound 14) inhibits the gatekeeper mutation of BCR-ABL-T315I. These results demonstrate that mutation of the gatekeeper threonine is a common mechanism of activation for tyrosine kinases and provide structural insights to guide the development of next-generation inhibitors.
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DOI:
10.1107/s0907444904019158
发表时间:
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影响因子:
2.2
作者:
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通讯作者:
Cowtan, K
影响因子:
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